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Subject[PATCH v4 1/2] hwmon: w83627ehf driver cleanup
Date
- Moved fan pwm register array pointers into per-instance data.
- Only read fan pwm data for installed/supported fans.
- Update fan max output and fan step output information from data in registers.
- Create max_output and step_output attribute files only if respective
fan pwm registers exist.

Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
---
drivers/hwmon/w83627ehf.c | 59 ++++++++++++++++++++++++++++++++++++++++++--
1 files changed, 56 insertions(+), 3 deletions(-)
diff --git a/drivers/hwmon/w83627ehf.c b/drivers/hwmon/w83627ehf.c
index 0dcaba9..e01a3e9 100644
--- a/drivers/hwmon/w83627ehf.c
+++ b/drivers/hwmon/w83627ehf.c
@@ -277,6 +277,11 @@ struct w83627ehf_data {
struct device *hwmon_dev;
struct mutex lock;

+ const u8 *REG_FAN_START_OUTPUT;
+ const u8 *REG_FAN_STOP_OUTPUT;
+ const u8 *REG_FAN_MAX_OUTPUT;
+ const u8 *REG_FAN_STEP_OUTPUT;
+
struct mutex update_lock;
char valid; /* !=0 if following fields are valid */
unsigned long last_updated; /* In jiffies */
@@ -524,7 +529,10 @@ static struct w83627ehf_data *w83627ehf_update_device(struct device *dev)
}
}

- for (i = 0; i < 4; i++) {
+ for (i = 0; i < data->pwm_num; i++) {
+ if (!(data->has_fan & (1 << i)))
+ continue;
+
/* pwmcfg, tolerance mapped for i=0, i=1 to same reg */
if (i != 1) {
pwmcfg = w83627ehf_read_value(data,
@@ -546,6 +554,17 @@ static struct w83627ehf_data *w83627ehf_update_device(struct device *dev)
W83627EHF_REG_FAN_STOP_OUTPUT[i]);
data->fan_stop_time[i] = w83627ehf_read_value(data,
W83627EHF_REG_FAN_STOP_TIME[i]);
+
+ if (data->REG_FAN_MAX_OUTPUT[i] != 0xff)
+ data->fan_max_output[i] =
+ w83627ehf_read_value(data,
+ data->REG_FAN_MAX_OUTPUT[i]);
+
+ if (data->REG_FAN_STEP_OUTPUT[i] != 0xff)
+ data->fan_step_output[i] =
+ w83627ehf_read_value(data,
+ data->REG_FAN_STEP_OUTPUT[i]);
+
data->target_temp[i] =
w83627ehf_read_value(data,
W83627EHF_REG_TARGET[i]) &
@@ -1126,7 +1145,7 @@ store_##reg(struct device *dev, struct device_attribute *attr, \
u32 val = SENSORS_LIMIT(simple_strtoul(buf, NULL, 10), 1, 255); \
mutex_lock(&data->update_lock); \
data->reg[nr] = val; \
- w83627ehf_write_value(data, W83627EHF_REG_##REG[nr], val); \
+ w83627ehf_write_value(data, data->REG_##REG[nr], val); \
mutex_unlock(&data->update_lock); \
return count; \
}
@@ -1206,12 +1225,26 @@ static struct sensor_device_attribute sda_sf3_arrays[] = {
store_fan_stop_output, 1),
SENSOR_ATTR(pwm3_stop_output, S_IWUSR | S_IRUGO, show_fan_stop_output,
store_fan_stop_output, 2),
+};

- /* pwm1 and pwm3 don't support max and step settings */
+
+/*
+ * pwm1 and pwm3 don't support max and step settings on all chips.
+ * Need to check support while generating/removing attribute files.
+ */
+static struct sensor_device_attribute sda_sf3_max_step_arrays[] = {
+ SENSOR_ATTR(pwm1_max_output, S_IWUSR | S_IRUGO, show_fan_max_output,
+ store_fan_max_output, 0),
+ SENSOR_ATTR(pwm1_step_output, S_IWUSR | S_IRUGO, show_fan_step_output,
+ store_fan_step_output, 0),
SENSOR_ATTR(pwm2_max_output, S_IWUSR | S_IRUGO, show_fan_max_output,
store_fan_max_output, 1),
SENSOR_ATTR(pwm2_step_output, S_IWUSR | S_IRUGO, show_fan_step_output,
store_fan_step_output, 1),
+ SENSOR_ATTR(pwm3_max_output, S_IWUSR | S_IRUGO, show_fan_max_output,
+ store_fan_max_output, 2),
+ SENSOR_ATTR(pwm3_step_output, S_IWUSR | S_IRUGO, show_fan_step_output,
+ store_fan_step_output, 2),
};

static ssize_t
@@ -1235,6 +1268,12 @@ static void w83627ehf_device_remove_files(struct device *dev)

for (i = 0; i < ARRAY_SIZE(sda_sf3_arrays); i++)
device_remove_file(dev, &sda_sf3_arrays[i].dev_attr);
+ for (i = 0; i < ARRAY_SIZE(sda_sf3_max_step_arrays); i++) {
+ struct sensor_device_attribute *attr =
+ &sda_sf3_max_step_arrays[i];
+ if (data->REG_FAN_STEP_OUTPUT[attr->index] != 0xff)
+ device_remove_file(dev, &attr->dev_attr);
+ }
for (i = 0; i < ARRAY_SIZE(sda_sf3_arrays_fan4); i++)
device_remove_file(dev, &sda_sf3_arrays_fan4[i].dev_attr);
for (i = 0; i < data->in_num; i++) {
@@ -1352,6 +1391,11 @@ static int __devinit w83627ehf_probe(struct platform_device *pdev)
data->in6_skip = !data->temp3_disable;
}

+ data->REG_FAN_START_OUTPUT = W83627EHF_REG_FAN_START_OUTPUT;
+ data->REG_FAN_STOP_OUTPUT = W83627EHF_REG_FAN_STOP_OUTPUT;
+ data->REG_FAN_MAX_OUTPUT = W83627EHF_REG_FAN_MAX_OUTPUT;
+ data->REG_FAN_STEP_OUTPUT = W83627EHF_REG_FAN_STEP_OUTPUT;
+
/* Initialize the chip */
w83627ehf_init_device(data);

@@ -1440,6 +1484,15 @@ static int __devinit w83627ehf_probe(struct platform_device *pdev)
&sda_sf3_arrays[i].dev_attr)))
goto exit_remove;

+ for (i = 0; i < ARRAY_SIZE(sda_sf3_max_step_arrays); i++) {
+ struct sensor_device_attribute *attr =
+ &sda_sf3_max_step_arrays[i];
+ if (data->REG_FAN_STEP_OUTPUT[attr->index] != 0xff) {
+ err = device_create_file(dev, &attr->dev_attr);
+ if (err)
+ goto exit_remove;
+ }
+ }
/* if fan4 is enabled create the sf3 files for it */
if ((data->has_fan & (1 << 3)) && data->pwm_num >= 4)
for (i = 0; i < ARRAY_SIZE(sda_sf3_arrays_fan4); i++) {
--
1.7.0.87.g0901d


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